linux-kernel - Re: [PATCH v3 6/7] misc: bcm-vk: add Broadcom VK driver

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Date:   Thu, 23 Apr 2020 01:19:52 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Scott Branden <scott.branden@...adcom.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        David Brown <david.brown@...aro.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Shuah Khan <skhan@...uxfoundation.org>,
        bjorn.andersson@...aro.org, Arnd Bergmann <arnd@...db.de>
Cc:     kbuild-all@...ts.01.org, "Rafael J . Wysocki" <rafael@...nel.org>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-fsdevel@...r.kernel.org,
        BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>,
        Olof Johansson <olof@...om.net>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Dan Carpenter <error27@...il.com>
Subject: Re: [PATCH v3 6/7] misc: bcm-vk: add Broadcom VK driver

Hi Scott,

I love your patch! Perhaps something to improve:

[auto build test WARNING on driver-core/driver-core-testing]
[also build test WARNING on next-20200421]
[cannot apply to char-misc/char-misc-testing kselftest/next linus/master v5.7-rc2]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Scott-Branden/firmware-add-partial-read-support-in-request_firmware_into_buf/20200422-114528
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git 55623260bb33e2ab849af76edf2253bc04cb241f
config: i386-allyesconfig (attached as .config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   drivers/misc/bcm-vk/bcm_vk_dev.c: In function 'bcm_vk_sync_card_info':
>> drivers/misc/bcm-vk/bcm_vk_dev.c:329:31: warning: right shift count >= width of type [-Wshift-count-overflow]
      vkwrite32(vk, vk->tdma_addr >> 32, BAR_1,
                                  ^~
   drivers/misc/bcm-vk/bcm_vk_dev.c: In function 'bcm_vk_buf_notify':
   drivers/misc/bcm-vk/bcm_vk_dev.c:377:30: warning: right shift count >= width of type [-Wshift-count-overflow]
     vkwrite32(vk, host_buf_addr >> 32, BAR_1,
                                 ^~

vim +329 drivers/misc/bcm-vk/bcm_vk_dev.c

   314	
   315	static int bcm_vk_sync_card_info(struct bcm_vk *vk)
   316	{
   317		uint32_t rdy_marker = vkread32(vk, BAR_1, VK_BAR1_MSGQ_DEF_RDY);
   318	
   319		/* check for marker, but allow diags mode to skip sync */
   320		if (!bcm_vk_msgq_marker_valid(vk))
   321			return (rdy_marker == VK_BAR1_DIAG_RDY_MARKER ? 0 : -EINVAL);
   322	
   323		/*
   324		 * Write down scratch addr which is used for DMA. For
   325		 * signed part, BAR1 is accessible only after boot2 has come
   326		 * up
   327		 */
   328		if (vk->tdma_addr) {
 > 329			vkwrite32(vk, vk->tdma_addr >> 32, BAR_1,
   330				  VK_BAR1_SCRATCH_OFF_LO);
   331			vkwrite32(vk, (uint32_t)vk->tdma_addr, BAR_1,
   332				  VK_BAR1_SCRATCH_OFF_HI);
   333			vkwrite32(vk, nr_scratch_pages * PAGE_SIZE, BAR_1,
   334				  VK_BAR1_SCRATCH_SZ_ADDR);
   335		}
   336	
   337		/* get static card info, only need to read once */
   338		bcm_vk_get_card_info(vk);
   339	
   340		return 0;
   341	}
   342	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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